November 3, 2021 · Applied Cybernetics Group
CVE-2021-31755 — Tenda AC11 Router
Tenda AC11 Router Stack Buffer Overflow Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Tenda
- Product
- AC11 Router
- EPSS
- 99.7th percentile (score 0.858, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-31755
CISA short description
Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to execute code via a crafted post request.
Required action
Apply updates per vendor instructions.